Eusebius of Nicomedia

Eusebius of Nicomedia (died 341) was Archbishop of Constantinople from 339 to 341, interrupting Paul I's terms.

Biography
Eusebius was born in Nicomedia, Asia Minor, and he was distantly related to the imperial family of Constantine the Great. He was educated alongside Arius by Lucian of Antioch, and, after Arius was excommunicated, Eusebius was the first man whom he contacted. Eusebius served as Bishop of Berytus in Phoenicia before becoming Bishop of Nicomedia (where the imperial court resided), and he was an early Arian. He was very politically astute and did not attend the Council of Antioch, which he rightly believed was stacked with opponents of Arius. He hoped for a better outcome when he attended the First Council of Nicaea in 325, and his defense of Arius led to his exile by Constantine. He later returned to favor with Constantine, serving as tutor to the future emperor Julian the Apostate and baptizing Constantine in 337. From 339 until his death in 341, he served as Archbishop of Constantinople.